typeck.c (common_type): Handle cv-qual unification for pointers to members.

typeck.c (common_type): Handle cv-qual unification for pointers to members.

	* typeck.c (common_type): Handle cv-qual unification for pointers
	to members.
	* decl.c (unqualified_namespace_lookup): Return error_mark_node
	on error.
	(lookup_name_real): Set LOOKUP_COMPLAIN when *not* parsing.
	* lex.c (do_identifier): If we got error_mark_node, call
	lookup_name again.

From-SVN: r25967